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Support variable delay of a variable selected assignment. 

This patch adds support for the following statement:

<vector>[<i>] <= #<delay> <value>.

It is a copy with slight modification of code from the next
else/if clause.
This commit is contained in:
Cary R 2008-01-15 15:25:27 -08:00 committed by Stephen Williams
parent eac6333d6c
commit 0370f30b20
1 changed files with 22 additions and 8 deletions
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30
tgt-vvp/vvp_process.c
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@ -236,14 +236,28 @@ static void assign_to_lvector(ivl_lval_t lval, unsigned bit,
if (part_off_ex) {
unsigned skip_assign = transient_id++;
assert(dexp == 0);
draw_eval_expr_into_integer(part_off_ex, 1);
/* If the index expression has XZ bits, skip the assign. */
fprintf(vvp_out, " %%jmp/1 t_%u, 4;\n", skip_assign);
fprintf(vvp_out, " %%ix/load 0, %u;\n", width);
fprintf(vvp_out, " %%assign/v0/x1 v%p_%lu, %u, %u;\n",
sig, use_word, delay, bit);
fprintf(vvp_out, "t_%u ;\n", skip_assign);
if (dexp == 0) {
/* Constant delay... */
draw_eval_expr_into_integer(part_off_ex, 1);
/* If the index expression has XZ bits, skip the assign. */
fprintf(vvp_out, " %%jmp/1 t_%u, 4;\n", skip_assign);
fprintf(vvp_out, " %%ix/load 0, %u;\n", width);
fprintf(vvp_out, " %%assign/v0/x1 v%p_%lu, %u, %u;\n",
sig, use_word, delay, bit);
fprintf(vvp_out, "t_%u ;\n", skip_assign);
} else {
/* Calculated delay... */
int delay_index = allocate_word();
draw_eval_expr_into_integer(dexp, delay_index);
draw_eval_expr_into_integer(part_off_ex, 1);
/* If the index expression has XZ bits, skip the assign. */
fprintf(vvp_out, " %%jmp/1 t_%u, 4;\n", skip_assign);
fprintf(vvp_out, " %%ix/load 0, %u;\n", width);
fprintf(vvp_out, " %%assign/v0/x1 v%p_%lu, %u, %u;\n",
sig, use_word, delay_index, bit);
fprintf(vvp_out, "t_%u ;\n", skip_assign);
clr_word(delay_index);
}
} else if (part_off>0 || ivl_lval_width(lval)!=ivl_signal_width(sig)) {
/* There is no mux expression, but a constant part